Saturday, October 7, 2023
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
SATURDAY, OCTOBER 7, 2023
ALL TIMES ARE IN EASTERN STANDARD TIME (EST)
SUNRISE: 0548E
SUNSET: 1716E
COOLER TEMPERATURES AND FOGGY CONDITIONS PRESENT AS RAIN MOVES
THROUGH BLUE HILL TODAY…
Today started off overcast and breezy as a cold front moved in
from the west and the remnants of post tropical storm Philippe
churned in the Atlantic southeast of us. This instability has
dropped the barometric pressure over 5 MB since 7am! That is a
similar pressure drop to what we experience during severe
thunderstorms.
The high temperatures have steadily dropped into near normal ranges,
yet our low temperature remains over 10 degrees warmer than normal.
The dew point also has stayed in the low 60’s for the past couple
of days which has kept us from experiencing those crisp fall
mornings that are typical for this time of the year.
The wind was quite active this morning and remained quite steady
throughout the afternoon hours. Our average speed so far has been
around 11mph, with winds mostly from the ESE and SE. Our peak gust
so far occurred shortly before noon at a speed of about 24mph.
Visibility has been impacted throughout the day by the fog and low
hanging stratus clouds. We saw about 20 miles in the middle of the
observation shift, but once the rain moved in our visibility went
down to 5 miles.
The maximum temperature so far today has been 68F, which is 4
degrees above the normal high of 64F. The minimum temperature
since midnight is 62F, which is 15 degrees above the normal low
of 47F.
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Today’s Observations:
7 A.M.
Weather: Overcast stratus
Temperature: 63F; Dew Point: 63F; Relative Humidity: 100%
Wind: SE @ 8G18 kts
Sea-level pressure: 1011.5 mb; 29.87 in. Hg: falling, then more
slowly
Visibility: 8 miles, thin fog
6-hr Max temp: 63F
6-hr Min temp: 62F
24-hr Precip: 0.00 inches
BHO SA 1155 E4 OVC 8 115/63/63/1308G18/987/ THN F ALQDS/ 8/6//
56009 10063 20062
10 A.M.
Weather: Overcast stratocumulus, altostratus, virga distant NW-N
Temperature: 65F; Dew Point: 63F; Relative Humidity: 94%
Wind: ESE @ 9 kts
Sea-level pressure: 1010.5 mb; 29.84 in. Hg: falling unsteadily
Visibility: 20 miles, thin fog
3-hr Precip: 0.00 inches
BHO SA 1455 E11 BKN 40 OVC 20 105/65/63/1209/984 THN F ALQDS
VIRGA DSNT NW-N/ 8/72/ 57010
1 P.M.
Weather: Overcast stratus, light drizzle
Temperature: 64F; Dew Point: 64F; Relative Humidity: 100%
Wind: ESE @ 8 kts
Sea-level pressure: 1006.4 mb; 29.72 in. Hg: falling, then more
rapidly
Visibility: 5 miles, fog
6-hr Max temp: 68F
6-hr Min temp: 63F
6-hr Precip: 0.02 inches
BHO SA 1755 E6 OVC 5L-F 064/64/64/1008/972/ 8/6// 58041 6002/
10068 20063
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SUMMARY FOR FRIDAY, OCTOBER 6, 2023
TEMPERATURE (DEGREES F)
MAX…….71 NORMAL…..65
MIN…….60 NORMAL…..48
MEAN……66 NORMAL…..56
DEPARTURE FROM 30-YEAR (1991-2020) NORMAL………+10
TOTAL DEPARTURE FOR THE MONTH…………………+53 [+8.6 DEGREES/DAY]
HEATING DEGREE DAYS (SEASON: JUL 2023 THRU JUN 2024)
TOTAL HEATING UNITS FOR YESTERDAY…………….0 DEPARTURE……..-9
TOTAL HEATING UNITS FOR THE MONTH…………….9 DEPARTURE…….-41
TOTAL HEATING UNITS FOR THE SEASON………….108 DEPARTURE…….-60
TOTAL HEATING UNITS LAST SEASON TO DATE……..163 DEPARTURE…….-55
COOLING DEGREE DAYS (SEASON: JAN 2023 THRU DEC 2023)
TOTAL COOLING UNITS FOR YESTERDAY…………….1 DEPARTURE……..+1
TOTAL COOLING UNITS FOR THE MONTH……………15 DEPARTURE…….+12
TOTAL COOLING UNITS FOR THE SEASON………….704 DEPARTURE…….+30
TOTAL COOLING UNITS LAST SEASON TO DATE……..884 DEPARTURE……-180
PEAK WIND GUST (MPH):
Note: Instruments designated #1 = Main Tower, #2 = South Tower,
F420C, Contacting, Merlin, and Richards are all Main Tower.
E=Estimated
F420C (Official)……….E20 SE @ 09:01 P.M.
VECTOR #1 (1-Sec)……….19 SE @ 09:01 P.M.
VECTOR #2 (1-Sec)……….20 SSE @ 09:06 P.M.
DAVIS #1……………….17 SE @ 06:34 P.M.
DAVIS #2 ………………21 S @ 12:00 A.M.
RMY #1 (Instantaneous)…..18 SE @ 09:00 P.M.
RMY #2 (Instantaneous)…..20 SSE @ 09:06 P.M.
MERLIN…………………21 SE
RICHARDS (C5C) (Inst)……18 @ 09:00 P.M.
FASTEST MILE:
CONTACTING ANEMOMETER/OFFICIAL………………13 SE @ 09:01 P.M.
MAXIMUM 2-MINUTE VECTOR #1 AVERAGE…………..14 @ 09:01 P.M.
MAXIMUM 2-MINUTE VECTOR #2 AVERAGE…………..13 @ 09:07 P.M.
MAXIMUM 2-MINUTE DAVIS #1 AVERAGE……………13 SE @ 09:02 P.M.
MAXIMUM 2-MINUTE DAVIS #2 AVERAGE……………14 S @ 12:01 A.M.
MAXIMUM 2-MINUTE RMY #1 AVERAGE……………..13 SE @ 09:01 P.M.
MAXIMUM 2-MINUTE RMY #2 AVERAGE……………..13 SE @ 11:48 P.M.
MAXIMUM 2-MINUTE RICHARDS (C5C) AVERAGE………14 @ 09:01 P.M.
AVERAGE WIND SPEED AND DIRECTION:
CONTACTING/OFFICIAL……..6.6 SE [159 total miles]
VECTOR #1………………7.3
VECTOR #2………………8.0
DAVIS #1……………….6.6 SE
DAVIS #2……………….7.6 SE
RMY #1…………………7.2 SE
RMY #2…………………8.0 SE
RICHARDS (C5C)………….8.0
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST):
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M……..0.00 DEPARTURE…..-0.17
TOTAL PRECIPITATION FOR THE MONTH…………..0.00 DEPARTURE…..-0.99
TOTAL PRECIPITATION FOR THE YEAR…………..47.22 DEPARTURE…..+7.56
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PRELIMINARY CLIMATE SUMMARY FOR OCTOBER CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN)/SUN(%)/PEAK GUST/VEC1/RMY GUST
PEAK GUST: F420C (Official)
VEC1: Vector #1 1-second gust
RMY: R.M. Young #1 wind gust recording system (Instantaneous)
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M: Missing data
10/1 68/50/59/+1/0.00/458/65 20 NNE VEC1 20 NNE RMY 19
10/2 68/55/62/+4/0.00/681/97 24 NE VEC1 23 NE RMY 24
10/3 81/54/68/+11/0.00/672/96 18 WSW VEC1 18 WSW RMY 18
10/4 81/64/73/+16/0.00/669/96 17 S VEC1 17 S RMY 16
10/5 77/59/68/+11/0.00/…/.. 24 S VEC1 24 S RMY 23
10/6 71/60/66/+10/…./…/.. 20 SE VEC1 19 SE RMY 18
10/7 The low since midnight is 62F, the daily normal low is 47F
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OCTOBER DAILY RECORDS TO DATE
.NONE…
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DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated)
RECORDS FOR OCTOBER 7
HIGH 88F IN 1963 (RECORD FOR MONTH)
LOW 30F IN 1904,1986
PRECIP 1.75 INCHES IN 1972
PEAK GUST 76 W IN 2020
RECORDS FOR OCTOBER 8
HIGH 81F IN 1916,1990
LOW 28F IN 1919
PRECIP 2.22 INCHES IN 1891
SNOWFALL TRACE IN 1988, 2001 (EARLIEST DATE)
PEAK GUST 60 MPH NE IN 1996
TODAY’S REPORT PREPARED BY: Amanda Joly
